Read and reflect on verse 1321 from Surah At-Tawba: [They are indeed denying it:] for, when they were called upon through revelation, "Believe in God, and strive hard [in His cause] together with His Ap...
وَإِذَا أُنْزِلَتْ سُورَةٌ أَنْ آمِنُوا بِاللَّهِ وَجَاهِدُوا مَعَ رَسُولِهِ اسْتَأْذَنَكَ أُولُو الطَّوْلِ مِنْهُمْ وَقَالُوا ذَرْنَا نَكُنْ مَعَ الْقَاعِدِينَ
[They are indeed denying it:] for, when they were called upon through revelation, "Believe in God, and strive hard [in His cause] together with His Apostle," [even] such of them as were well able [to go to war] asked thee for exemption, saying, "Allow us to stay behind with those who remain at home!"